Fokker (H.G.) and Gould (Bruce) : Flying Dutchman, The Life of Anthony Fokker, 1938; Kingsford (A.K.) : With the Earth Beneath, first edition, plates, 1936; Hubbard (T. O'B) and Turner (C.C.) The Boys' book of Aeroplanes, first edition, plates, 1912; Wonders of World Aviation, volume 1 and 2, plates, diagrams, n.d.; and others similiar (A Lot) (23)